What made the byzantine empire rich and successful?

Constantine made Constantinople the capital of the Byzantine Empire in 330 because it was well protected, had a great location, and was wealthy. The city was rich and successful for so long because it was well protected by water on three sides and had land and sea walls!

Non-landowners, former slaves, native americans, and women to vote. in 1965, the voting rights act was passed to support minorities and remove the literacy